雲仙水無川における流出土砂量の推定方法

• 池谷 浩

  建設省九州地方建設局河川部

書誌事項

タイトル別名

• A Method for Estimation on the Run-off Sediment Volume of Debris Flows in the Mizunashi River, Unzen Volcano
• ウンゼン ミズナシガワ ニ オケル リュウシュツ ドシャリョウ ノ スイテイ

抄録

To prevent the debris flow disasters around the active volcanos, Sabo Master Plan for disaster protection is made. In case of making the plan, it is very important to estimate the run-off sediment volume by debris flows. Especially conditions of planning such as deposit volume of pyroclastic flow, critical rainfall for the occurrence of debris flow and so on change by volcanic activity. Moreover, time series variation of conditions on sediment movement will occur in connection with volcanic activity, and will influence the occurrence of debris flow, run-off sediment volume by debris flows. I propose the necessity of basin condition investigation based on time series and showed 4 periods of volcanic activity in the case study of Mt Unzen. Especially in case that large sediment volume of pyroclastic flow are existing at greater part of basin area, run-off sediment volume by debris flow is shown by the f ollwing equation.<br>Q_s=(2.79×R)-112.92<br>where, Q_s: run-off sediment volume (×10³m³), R: accumulated rainfall (mm) .

収録刊行物

• 砂防学会誌

  砂防学会誌 47 (5), 36-42, 1995

  Japan Society of Erosion Control Engineering

キーワード

• Volcanic activity
• Time series variation
• Run-off sediment volume

詳細情報

• CRID: 1390282679044403200
• NII論文ID: 10006144686
• NII書誌ID: AN0012035X
• DOI: 10.11475/sabo1973.47.5_36
• NDL書誌ID: 3596631
• ISSN: 02868385
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I3596631
• データソース種別:
  • JaLC
  • NDL
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可